Hmmm, I can see why this is all so confusing for you.
Was blood work ever done on him before in his life and what were his glucose levels?
Was the NV food something new you had just started?
Does he spend time in the yard alone?
I guess if the food wasn't new and he spends time in the yard alone - to me this almost sounds like "an event" - like he got into something awful. Especially because now the symptoms have suddenly resolved just as soon as they appeared. But, it does appear that insulinoma can be episodic - so...it's really tough to say.
I guess if it were me - bc of the prognosis and how scared I'd be, I'd have to get it ruled out. I found this:
"The single most reliable test for the diagnosis of insulinoma is the finding of an inappropriately high serum insulin concentration in an animal with hypoglycemia. The animal may be fasted until blood glucose concentration decreases to below 70 milligrams per deciliter of blood. At that time, a blood sample is sent to the laboratory for measurement of serum insulin concentration."
Here is a good article. Please keep us upated, I hope you can get this figured out - it's scary not knowing what's happening with these little guys.
